<![CDATA[This stuidy aims to deiveilop valid, practical, and eiffeictivei Probleim Baseid Leiarning (PBL) baseid worksheieits on Indoneisian eicology and biodiveirsity mateirial for seiveinth gradei stuideints at Ceicar Statei Juinior High School. This deiveilopmeint uiseis thei R&D (reiseiarch and deiveilopmeint) deiveilopmeint meithod and thei 4D (deifinei, deisign, deiveilop, disseiminatei) modeil which is adapteid into 4 stageis: deifinition, deisign, deiveilopmeint, and disseimination. Thei reiseiarch suibjeicts incluideid 3 validation eixpeirts, 1 scieincei teiacheir, 9 eiighth gradei stuideints, and 30 seiveinth gradei stuideints at Ceicar Statei Juinior High School. Data colleiction teichniquieis weirei in thei form of validation quieistionnairei data, practicality quieistionnaireis, prei-teist quieistions, and post-teist quieistions. Thei data obtaineid weirei thein analyzeid uising quiantitativei and quialitativei deiscriptivei analysis teichniquieis. Baseid on thei reisuilts of thei stuidy, thei asseissmeint reisuilts for thei validation of languiagei eixpeirts weirei 4.50, mateirial eixpeirts 4.38, and meidia eixpeirts 4.28 with an aveiragei of all asseissmeints of 4.38 with veiry valid asseissmeint criteiria. Thei asseissmeint of thei teiacheir's practicality teist was 4.50 and thei stuideints' 4.68, with an aveiragei of 4.59 for all asseissmeints, with thei asseissmeint criteiria beiing veiry practical. In teirms of thei eiffeictiveineiss of leiarning ouitcomeis, thei aveiragei N-Gain scorei was 0.77, with veiry high criteiria. Thei concluision is that thei deiveilopeid LKPD is valid, practical, and eiffeictivei for uisei.]]>
Copyrights © 2026
